Commit 00ee0309 authored May 29, 2013 by Chen Gang Committed by Matt Turner Jul 19, 2013

alpha: kernel: using memcpy() instead of strcpy()



When sending message in send_secondary_console_msg(), the length is not
include the NUL byte, and also not copy NUL to 'ipc_buffer'.

When receive message in recv_secondary_console_msg(), the 'cnt' also
excludes NUL.

So when get string from ipc_buffer, it may not be NUL terminated.

Then use memcpy() instead of strcpy(), and set last byte NUL.

Reviewed-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Chen Gang <gang.chen@asianux.com>

parent 29b7a47a

arch/alpha/kernel/smp.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -266,7 +266,8 @@ recv_secondary_console_msg(void)
		else {
		cp1 = (char *) &cpu->ipc_buffer[11];
		cp2 = buf;
		strcpy(cp2, cp1);
		memcpy(cp2, cp1, cnt);
		cp2[cnt] = '\0';

		while ((cp2 = strchr(cp2, '\r')) != 0) {
		*cp2 = ' ';